Windows Hello for Business cloud trust is a new trust model that is currently in preview. This trust model will enable Windows Hello for Business deployment using the infrastructure introduced for supporting security key sign-in on Hybrid Azure AD-joined devices and on-premises resource access on Azure AD Joined devices. Cloud trust is the preferred deployment model if you do not need to support certificate authentication scenarios. For more information, see Hybrid Cloud Trust Deployment (Preview). Windows Hello for Business is the modern, two-factor credential for Windows 10. Microsoft will be deprecating virtual smart cards in the future, but no date is set at this time. Customers using Windows 10 and virtual smart cards should move to Windows Hello for Business. Microsoft will publish the date early to ensure customers have adequate lead time to move to Windows Hello for Business. Microsoft recommends that new Windows 10 deployments use Windows Hello for Business. Virtual smart cards remain supported for Windows 7 and Windows 8. Microsoft is committed to its vision of a world without passwords. We recognize the convenience provided by convenience PIN, but it stills uses a password for authentication. Microsoft recommends that customers using Windows 10 and convenience PINs should move to Windows Hello for Business. New Windows 10 deployments should deploy Windows Hello for Business and not convenience PINs. Microsoft will be deprecating convenience PINs in the future and will publish the date early to ensure customers have adequate lead time to deploy Windows Hello for Business. Remote Desktop Protocol (RDP) doesn't currently support using key-based authentication and self-signed certificates as supplied credentials. However, you can deploy certificates in the key trust model to enable RDP. For more information, see Deploying certificates to key trust users to enable RDP. In addition, Windows Hello for Business key trust can be also used with RDP with Windows Defender Remote Credential Guard without deploying certificates. Windows Hello for Business deployments using Configuration Manager should follow the hybrid deployment model that uses Active Directory Federation Services. Starting in Configuration Manager version 1910, certificate-based authentication with Windows Hello for Business settings isn't supported. Key-based authentication is still valid with Configuration Manager. For more information, see Windows Hello for Business settings in Configuration Manager. Windows Hello for Business deployments using Intune allow for a great deal of flexibility in deployment. For more information, see Integrate Windows Hello for Business with Microsoft Intune. The maximum number of supported enrollments on a single Windows 10 computer is 10. This lets 10 users each enroll their face and up to 10 fingerprints. For devices with more than 10 users, we strongly encourage the use of FIDO2 security keys. When using Windows Hello for Business, the PIN isn't a symmetric key, whereas the password is a symmetric key. With passwords, there's a server that has some representation of the password. With Windows Hello for Business, the PIN is user-provided entropy used to load the private key in the Trusted Platform Module (TPM). The server doesn't have a copy of the PIN. For that matter, the Windows client doesn't have a copy of the current PIN either. The user must provide the entropy, the TPM-protected key, and the TPM that generated that key in order to successfully access the private key. The statement "PIN is stronger than Password" is not directed at the strength of the entropy used by the PIN. It's about the difference between providing entropy versus continuing the use of a symmetric key (the password). The TPM has anti-hammering features that thwart brute-force PIN attacks (an attacker's continuous attempt to try all combination of PINs). Some organizations may worry about shoulder surfing. For those organizations, rather than increase the complexity of the PIN, implement the Multifactor Unlock feature. A user will be prompted to set up a Windows Hello for Business key on an Azure AD registered devices if the feature is enabled by policy. If the user has an existing Windows Hello container, the Windows Hello for Business key will be enrolled in that container and will be protected using their exiting gestures. If a user has signed into their Azure AD registered device with Windows Hello, their Windows Hello for Business key will be used to authenticate the user's work identity when they try to use Azure AD resources. The Windows Hello for Business key meets Azure AD multi-factor authentication (MFA) requirements and reduces the number of MFA prompts users will see when accessing resources. It's possible to Azure AD register a domain joined device. If the domain joined device has a convenience PIN, sign in with the convenience PIN will no longer work. This configuration isn't supported by Windows Hello for Business. For more information, please read Azure AD registered devices. The Key Admins and Enterprise Key Admins groups are created when you install the first Windows Server 2016 domain controller into a domain. Domain controllers running previous versions of Windows Server can't translate the security identifier (SID) to a name. To resolve this issue, transfer the PDC emulator domain role to a domain controller running Windows Server 2016. It's currently possible to set a convenience PIN on Azure Active Directory Joined or Hybrid Active Directory Joined devices. Convenience PIN isn't supported for Azure Active Directory user accounts (synchronized identities included). It's only supported for on-premises Domain Joined users and local account users. Yes. Starting with Windows 10, version 21H1 an external Windows Hello compatible camera can be used if a device already supports an internal Windows Hello camera. When both cameras are present, the external camera is used for face authentication. For more information, see IT tools to support Windows 10, version 21H1. However, using external Hello cameras and accessories is restricted if ESS is enabled, please see Windows Hello Enhanced Sign-in Security. Some laptops and tablets with keyboards that close may not use an external Windows Hello compatible camera or other Windows Hello compatible accessory when the computer is docked with the lid closed. The issue has been addressed in the latest Windows Insiders builds and will be available in the future version of Windows 11. In a hybrid deployment, a user's public key must sync from Azure AD to AD before it can be used to authenticate against a domain controller. This sync is handled by Azure AD Connect and will occur during a normal sync cycle. Watch Principal Program Manager Karanbir Singh's Microsoft's guide for going password-less Ignite 2017 presentation. Microsoft's password-less strategy The user experience for Windows Hello for Business occurs after the user signs in, after you deploy Windows Hello for Business policy settings to your environment. If the user can sign in with a password, they can reset their PIN by selecting the "I forgot my PIN" link in Settings. Beginning with Windows 10 1709, users can reset their PIN above the lock screen by selecting the "I forgot my PIN" link on the PIN credential provider. For on-premises deployments, devices must be well-connected to their on-premises network (domain controllers and/or certificate authority) to reset their PINs. Hybrid customers can onboard their Azure tenant to use the Windows Hello for Business PIN reset service to reset their PINs. Non-destructive PIN reset works without access to the corporate network. Destructive PIN reset requires access to the corporate network. For more details about destructive and non-destructive PIN reset, see PIN reset. Communicating with Azure Active Directory uses the following URLs:
If your environment uses Microsoft Intune, you will also need these other URLs:
Windows Hello for Business has two types of PIN reset: non-destructive and destructive. Organizations running Windows 10 version 1903 and later and Azure Active Directory can take advantage of the Microsoft PIN Reset service. Once on-boarded to a tenant and deployed to computers, users who have forgotten their PINs can authenticate to Azure, provide a second factor of authentication, and reset their PIN without reprovisioning a new Windows Hello for Business enrollment. This flow is a non-destructive PIN reset because the user doesn't delete the current credential and obtain a new one. For more information, see PIN Reset. Organizations that have the on-premises deployment of Windows Hello for Business, or those not using Windows 10 version 1903 and later can use destructive PIN reset. With destructive PIN reset, users that have forgotten their PIN can authenticate by using their password and then performing a second factor of authentication to reprovision their Windows Hello for Business credential. Reprovisioning deletes the old credential and requests a new credential and certificate. On-premises deployments need network connectivity to their domain controllers, Active Directory Federation Services, and their issuing certificate authority to perform a destructive PIN reset. For hybrid Azure Active Directory joined devices, destructive PIN reset is only supported with the certificate trust model and the latest updates to Active Directory Federation Services. The trust models of your deployment determine how you authenticate to Active Directory (on-premises). Both key trust and certificate trust use the same hardware-backed, two-factor credential. The differences between the two trust types are:
The key trust model authenticates to Active Directory by using a raw key. Windows Server 2016 domain controllers enable this authentication. Key trust authenticate doesn't require an enterprise issued certificate, therefore you don't need to issue certificates to users (domain controller certificates are still needed). The certificate trust model authenticates to Active Directory by using a certificate. Because this authentication uses a certificate, domain controllers running previous versions of Windows Server can authenticate the user. Therefore, you need to issue certificates to users, but you don't need Windows Server 2016 domain controllers. The certificate used in certificate trust uses the TPM-protected private key to request a certificate from your enterprise's issuing certificate authority. There are many deployment options from which to choose. Some of those options require an adequate number of Windows Server 2016 domain controllers in the site where you've deployed Windows Hello for Business. There are other deployment options that use existing Windows Server 2008 R2 or later domain controllers. Choose the deployment option that best suits your environment. Review Azure AD Connect sync: Attributes synchronized to Azure Active Directory for a list of attributes that sync based on scenarios. The base scenarios that include Windows Hello for Business are the Windows 10 scenario and the Device writeback scenario. Your environment may include other attributes. Windows Hello for Business is two-factor authentication based on the observed authentication factors of: something you have, something you know, and something that's part of you. Windows Hello for Business incorporates two of these factors: something you have (the user's private key protected by the device's security module) and something you know (your PIN). With the proper hardware, you can enhance the user experience by introducing biometrics. By using biometrics, you can replace the "something you know" authentication factor with the "something that is part of you" factor, with the assurances that users can fall back to the "something you know factor". When you enroll in Windows Hello, a representation of your face called an enrollment profile is created more information can be found on Windows Hello face authentication. This enrollment profile biometrics data is device specific, is stored locally on the device, and does not leave the device or roam with the user. Some external fingerprint sensors store biometric data on the fingerprint module itself rather than on Windows device. Even in this case, the biometrics data is stored locally on those modules, is device specific, doesn’t roam, never leaves the module, and is never sent to Microsoft cloud or external server. For more details see Windows Hello biometrics in the enterprise. Windows Hello biometrics data is stored on the device as an encrypted template database. The data from the biometrics sensor (e.g., face camera or fingerprint reader) creates a data representation—or graph—that is then encrypted before it’s stored on the device. Each biometrics sensor on the device which is used by Windows Hello (face or fingerprint) will have its own biometric database file where template data is stored. Each biometrics database file is encrypted with unique, randomly generated key that is encrypted to the system using AES encryption producing an SHA256 hash. Since Windows Hello biometrics data is stored in encrypted format, no user, or any process other than Windows Hello has access to it. Windows Hello biometrics template database file is created on the device only when a user is enrolled into Windows Hello biometrics-based authentication. Your workplace or IT administrator may have turned certain authentication functionality, however, it is always your choice if you want to use Windows Hello or an alternative method (e.g. pin). Users can check their current enrollment into Windows Hello biometrics by going to sign-in options on their device. Go to Start > Settings > Accounts > Sign-in options. Or just click on Go to Sign-in options. To enroll into Windows Hello, user can go to Start > Settings > Accounts > Sign-in options, select the Windows Hello method that they want to set up, and then select Set up. If you don't see Windows Hello in Sign-in options, then it may not be available for your device or blocked by admin via policy. Admins can by policy request users to enroll into Windows Hello during autopilot or during initial setup of the device. Admins can disallow users to enroll into biometrics via Windows hello for business policy configurations. However, when allowed via policy configurations, enrollment into Windows Hello biometrics is always optional for users. To remove Windows Hello and any associated biometric identification data from the device, user can go to Start > Settings > Accounts > Sign-in options. Select the Windows Hello biometrics authentication method you want to remove, and then select Remove. This will unenroll the user from Windows Hello biometrics auth and will also delete the associated biometrics template database file. For more details see Windows sign-in options and account protection (microsoft.com). To help us keep things working properly, to help detect and prevent fraud, and to continue improving Windows Hello, we collect diagnostic data about how people use Windows Hello. For example, data about whether people sign in with their face, iris, fingerprint, or PIN; the number of times they use it; and whether it works or not is all valuable information that helps us build a better product. The data is pseudonymized, does not include biometric information, and is encrypted before it is transmitted to Microsoft. You can choose to stop sending diagnostic data to Microsoft at any time. Learn more about diagnostic data in Windows. Starting in Windows 10, version 1709, you can use multi-factor unlock to require users to provide an extra factor to unlock their device. Authentication remains two-factor, but another factor is required before Windows allows the user to reach the desktop. To learn more, see Multifactor Unlock. Wearing a mask to enroll is a security concern because other users wearing a similar mask may be able to unlock your device. The product group is aware of this behavior and is investigating this topic further. Remove a mask if you're wearing one when you enroll or unlock with Windows Hello face authentication. If your working environment doesn’t allow you to remove a mask temporarily, consider unenrolling from face authentication and only using PIN or fingerprint. Windows Hello represents the biometric framework provided in Windows 10. Windows Hello lets users use biometrics to sign in to their devices by securely storing their user name and password and releasing it for authentication when the user successfully identifies themselves using biometrics. Windows Hello for Business uses asymmetric keys protected by the device's security module that requires a user gesture (PIN or biometrics) to authenticate. Windows 10 doesn't allow the local administrator to enroll biometric gestures (face or fingerprint). No. If your organization is federated or using online services, such as Azure AD Connect, Office 365, or OneDrive, then you must use a hybrid deployment model. On-premises deployments are exclusive to organizations who need more time before moving to the cloud and exclusively use Active Directory. Yes. Our simple PIN algorithm looks for and disallows any PIN that has a constant delta from one digit to the next. The algorithm counts the number of steps required to reach the next digit, overflowing at 10 ('zero'). So, for example:
This check prevents repeating numbers, sequential numbers, and simple patterns. It always results in a list of 100 disallowed PINs (independent of the PIN length). This algorithm doesn't apply to alphanumeric PINs. Windows Hello for Business provides a PIN caching user experience by using a ticketing system. Rather than caching a PIN, processes cache a ticket they can use to request private key operations. Azure AD and Active Directory sign-in keys are cached under lock. This means the keys remain available for use without prompting, as long as the user is interactively signed-in. Microsoft Account sign-in keys are transactional keys, which means the user is always prompted when accessing the key. Beginning with Windows 10, version 1709, Windows Hello for Business used as a smart card (smart card emulation that is enabled by default) provides the same user experience of default smart card PIN caching. Each process requesting a private key operation will prompt the user for the PIN on first use. Subsequent private key operations won't prompt the user for the PIN. The smart card emulation feature of Windows Hello for Business verifies the PIN and then discards the PIN in exchange for a ticket. The process doesn't receive the PIN, but rather the ticket that grants them private key operations. Windows 10 doesn't provide any Group Policy settings to adjust this caching. No. The movement away from passwords is accomplished by gradually reducing the use of the password. In situations where you can't authenticate by using biometrics, you need a fallback mechanism that isn't a password. The PIN is the fallback mechanism. Disabling or hiding the PIN credential provider will disable the use of biometrics. Wherever possible, Windows Hello for Business takes advantage of Trusted Platform Module (TPM) 2.0 hardware to generate and protect keys. However, Windows Hello and Windows Hello for Business don't require a TPM. Administrators can choose to allow key operations in software. Whenever possible, Microsoft strongly recommends the use of TPM hardware. The TPM protects against various known and potential attacks, including PIN brute-force attacks. The TPM provides an additional layer of protection after an account lockout, too. When the TPM has locked the key material, the user will need to reset the PIN (which means they'll need to use MFA to reauthenticate to the IDP before the IDP allows them to re-register). Yes. You can use the on-premises Windows Hello for Business deployment and combine it with a third-party MFA provider that doesn't require internet connectivity to achieve an air-gapped Windows Hello for Business deployment. Yes, if you're using federated hybrid deployment, you can use any third-party that provides an Active Directory Federation Services (AD FS) multi-factor authentication adapter. A list of third-party MFA adapters can be found here. Windows Hello for Business works with any third-party federation servers that support the protocols used during the provisioning experience.
Windows Hello for Business is a feature of Windows 10. At this time, Microsoft isn't developing clients for other platforms. However, Microsoft is open to third-parties who are interested in moving these platforms away from passwords. Interested third-parties can get more information by emailing . Windows Hello for Business is a feature of the Windows platform. At this time, Microsoft isn't developing clients for other platforms. No, Azure AD DS is a separately managed environment in Azure, and hybrid device registration with cloud Azure AD isn't available for it via Azure AD Connect. Hence, Windows Hello for Business doesn't work with Azure AD. |
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